It's the exact same thing, just with a new rewards program. There's no reason not to have it, even if you don't buy the EDGE discount, the rewards program is still free. Yes, the rewards are overpriced, as they are with any rewards program, but I already redeemed a $5 coupon which is never a bad thing, and you get a free B2G1 for signing up.
Nothing about the EDGE changes at all, it's just a shiny new card.